Machine for embossing sheet-metal printing plates



Oct. 11, 1938.v J. KRELL MACHINE FOR EMBOSSI'NG SHEET YME'IYAL PRINTING PLAT ES Y Filed NOV. 30-, 1937 2 Sheets-Sheet l I Oct. 11, 1938. Y -J KRELL 2,133,201

MACHINE FOR EMBOSSING SHEET METAL PRINTING PLATES Filed Nov. 30, 1957 2 Sheets $he et 2 yawn/ah:

Patented Oct. 11, 1938 I 3 MACHINE FOR EMBOSSING SHEET-METAL PRINTING PLATES Joseph Krell, Berlin-Zehlendorf, Germany I Application November 30, 1937, Serial No. 173,372 r In Germany December 9, 1936 g 6 Claims. (01. 1974.7)

My invention relates to a machine for em- The means for adjusting the type wheels by bossing sheet-metal printing plates. Such plates rotating the shaft 4 is a hand wheel I marked can be made of sheet metal of any kind which is with types. The shaft 8 of the hand wheel is comparatively thin, and can be used for printing mounted to rotate in the shorter arm 3 of a belladdresses, or for any other printing operation. crank fulcrumed at H in the frame I. A spring 5 -A machine of this type generally is equipped l2 tends to pull the longer arm Iii of the bellwith a pair of type wheels, one with punch, and crank to the left, and to place the hand wheel I the other with matrix members, and the sheet in horizontal position. A pulley I3 is keyed on metal plate to be embossed is held between the the hand-wheel shaft 8, and a similar pulley I5 10 members. The means for adjusting the type is keyed on the lower end of the type-wheel shaft 10 wheels is a hand wheel, 4. The two pulleys are preferably of the wedge- In machines as designed heretofore, extra section type, and connected by a cord ll, also of means such as a pedal is required for throwing in wedge section, and preferably made of elastic mathe clutch, so that the operator has to perform terial such as rubber. This connection of the the two operations of adjusting the type wheels two p i l P mits of tilting the hand-wheel and of depressing the t h p about the fulcrum ll without interference on the It is an object of my invention to improve a P O p y and has he ditional advanmachine of the type described, with a view to age of noiseless operation. eliminating the extra operation of throwing in A ge w e is ed on e t pe-wheel the clutch shaft 4 above the pulley J5, and the shaft is con- To this end, I provide a locking mechanism for ected to the shaft Ila of a type indicator I! by the type wheels which includes a gear wheel on bevel gearing IIb, so that the indicator rotates in the shaft of the type wheels, and a pawl for coy o m w th t e type e s 3- operation with the gear wheel. Part of this mech- A double-armed lever I 9 is fulcrumed on the anism which'is operatively connected to the typeframe I for operating the punch members 5, and adjusting handwheel, is a member which cona similar lever 2|! is provided for operating the trols the clutch. matrix members 6. A pair of toggle links 2| and Not only is the operation'of the embossing ma- 22 are p ot d o the p cti double-a med 3o chine much facilitated by this novel arrangelevers at their outer, and to each other at their t, t t is also possible t adjust t perinner ends. Fulcrumed on the frame I at 23 is a ators seat to such a level that her stature is con- -a med operating lever for the to gle-links sidered, and she can operate in the most conechanism whose upp 81'!!! 24 en a es t venient position without being restricted by the Divot y w ch the li ks 2| and 22 areconnected.

necessity of reaching the pedal with her foot. A spring 8 is c nn c d to-t p vot onn tin In the accompanying drawings an embossing the lever l9 and the link 2|, and the lower end of machine embodying my invention is illustrated the spring is anchored on the frame.

by way of example. 29 is'the driving shaft of the machine. A pul- In the drawings ley 30 is keyed on the shaft and driven from a Fig. 1 is a side elevation of the machine, showmotor 42 through a belt ll It is understood that ing its parts before the clutch is thigown in, the driving shaft can be operated by any suitable Fig. 2 shows certain parts of the machine, means, and from any source of power. A clutch drawn to a larger scale, disk 21 is free to turn on the driving shaft 29, and 3 Shows the e Darts 88 n 2 after is connected to the lower arm 25 of the operat- 45 the clutch has been thrown in, ing lever by a rod 26. 3| is the mating clutch 45 Fig. 4 is a partly sectional plan view, and disk which is secured to, or integral with, the pul- Fig. 51s an elevation, of the clutch. ley 30 and has a circular row ofholes 32. A

Referring now to the drawings, I, Fig. l, is the clutch pin 33 whose free end is partly cut away frame of the machine in which is mounted to roto form a step or shoulder, as best seen in Fig. 5,

5o tate a vertical type-wheel shaft 4. .2 and 3 are an isinserted in the clutch disk 21 and urged toward upper and a lower type wheel on the shaft, 5 are the mating\ disk 3! by a spring 34. Normally, punch members in the upper, and 6 are matrix however, i. e., whilethe parts are inthe position members in the lower type wheel. A printing according to Figs. 1 and 2, the pin is retained by plate a is placed between the members on a suitthe knife-like lower end .of a pawl which is ful- 55 able holder it. crumed on the frame! at 31. The knife 33 is 55 formed on the free end of the lower arm 36 of the pawl and its upper arm 33 is equipped with a lug 33 for engaging between the teeth of the gear wheel IS. The pawl and a rod 40 connecting its lower arm 36 to the longer arm III of the handwheel supporting bell-crank, make up the looking I mechanism referred to, and the lower arm 38 of the pawl, with its knife 35, is the part of the looking mechanism which controls the clutch 21, 3|,

The operation of the machine is as follows: Normally, the spring l2 holds the hand wheel 1 in horizontal position, and, through rod 40,

the pawl 36, 33 away from the teeth of the spur' gear l6. The hand wheel is rotated to adjust the type wheels 2, 3 for the type required which is indicated by the indicator l1. After the type has been selected, the hand wheel 1 is tilted about its-pivot ll through a small angle from the horizontal position, and moved into the position shown in Fig. 3. Rod 40 moves the pawl into the teeth of the spur gear IS with its lug 39 and, at the same time, moves the knife 35 at the lower end of the pawl away from the stepped end of pin 33. 'The type disks are now locked, and the i and matrix members 5, 3 into the printing plate a. Upon continued rotation of the disk 21 with the driving shaft 29, the operating lever 24, 25 is returned into its initial position, Fig. l, and retracts the links 2| and 22 with the assistance of spring 28, so that the double-armed levers l9 and 20 are moved into inactive position with respect to the punch and matrix members.

Before the driving shaft 23, and the disk 21 connected to it by the pin 33, have performed a complete revolution, the adjusting wheel 1 is returned into its horizontal position, Fig. 2, and the lug 33 of the pawl 36, 381s disengaged from the gear wheel It by means of rod 43. At the same time, the knife-like member 35 at the lower end of the pawl is moved into the path of the pin 33 so that, as the 'pin comes round, after the disk 21 has performed a complete revolution, its stepped end is pushed back by the knife in the manner of a wedge, and the clutch isthrown out, Fig. f1.

The machine is now ready for the embossing of the next type which is performed exactly as described.

I claim:

1. In a machine for embossing sheet-metal printing plates, a driving shaft, a pair of rotary type wheels, punch members in one, and matrix members in the other wheel, means for holding a printing plate between the members, mechanism for operating the members, a clutch for connecting the driving shaft to the mechanism, a

hand wheel for adjusting the type wheels, a tiltable bearing for the hand wheel, a gear wheel connected to the type wheels, a pawl adapted to engage in the gear wheel and operatively connected to the tilting bearing, and a member on the pawl for controlling the clutch.

2. In a machine for embossing sheet-metal printing plates, a driving shaft, a pair of rotary type wheels, punch members in one, and matrix members in the other wheel, means for holding a printing plate between the members, mechanism for operating the members, a clutch for connecting the driving shaft to the mechanism, a hand wheel for adjusting the type wheels, a tiltable bearing. for the hand wheel, a gear wheel con- 'nected to the type wheels, a pawl adapted to engage in the gear wheel and operatively connected to the tilting bearing, and a member on the pawl arranged to throw out the clutch when the pawl is disengaged from the gear wheel, and to throw in the clutch when the pawl is engaged in the gear wheel.

3. In a machine for embossing sheet-metal printing plates, a frame, a driving shaft mounted to rotate on the frame, a pair of type wheels mounted to rotate in the frame, punch members in one, and matrix members in the other wheel, 1

means forholding a printing plate between the members, a clutch for connecting the driving shaft to the mechanism, a bellcrank fulcrumed on the frame, a hand wheel mounted to rotate on the bellcrank, a-pulley on the hand wheel, a pulley connected to the type wheels, and a flexible member connecting the pulleys, for adjusting the type wheels; a type-wheel'locking mechanism operatively connected to the bellcrank, and a member forming part of the locking mechanism for controlling the clutch.

4. In a machine for embossing sheet-metal" mechanism operatively connected to the bellcrank, and a member forming part of the locking mechanismfor controlling the clutch.

5. In a machine for embossing sheet-metal printing plates, a frame, a driven shaft mounted to rotate on the frame, a pair of type wheels mounted to rotate in the frame, punch members in one, and matrix members in the other wheel,

means for holding a printing plate between the members, a clutch for connecting the driving shaft to the mechanism, a bellcrank fulcrumed on the frame, a hand wheel mounted to rotate on the bellcrank, a.pulley on the hand wheel, a

pulley connected to the type wheels, and a wedgesection belt connecting the pulleys, for adjusting the type wheels; a type-wheel locking mechanism operatively connected to the bellcrank, and a member forming part of the locking mechanism for controlling the clutch.

6. In a machine for embossing sheet-metal printing plates, a frame, a driving shaft mounted to rotate'on the frame, a pair of type wheels mounted to rotate in the frame. punch members in one, and matrix members in the other wheel,

,means for holding a printing plate between the members, a clutch for connecting the driving shaft to the mechanism, a spring-controlled bolt for connecting the clutch parts, a bellcrank fulcrumed on the frame and having arms of different lengths, 'a hand wheel mounted to rotate on the shorter arm of the bellcrank for adjusting the type wheels, a double-armedpawl fulcrumed on the frame and having arms of difierent lengths, 2. lug on the shorter arm of the pawl for locking the type wheels, a. rod connecting the shorter arm of the pawl to the longer arm of the bellcrank, and a knife-like member on the longer arm of the pawl for holding the clutch bolt in inactive position while the lug on the pawl is disengaged from the type wheels, and for releasing the bolt to move into clutching position under the action of its spring when the lug is engaged with the type wheels.

JOSEPH KRELL. 

